If the web interface is similar to my Linkstation live, you can see what kind of HDD you have inside.
Go to "System Status" then "Drive properties".
You can see the unit name. If the name is ST31000340AS or similar, you've got Seagate HDD inside.
Edit : Sorry, I just realized that you're on a DriveStation, not a Linstation so you probably can't see a web interface.
If it's the case, I don't know how you can see this information. :(
Message Edited by Almamida on 01-25-2009 03:54 PM